WO2012114428A1

WO2012114428A1 - Unit core of rotating electrical machine

Info

Publication number: WO2012114428A1
Application number: PCT/JP2011/053685
Authority: WO
Inventors: 木村　康樹; 諭山代; 小寺　秀明; 秋田　裕之
Original assignee: 三菱電機株式会社
Priority date: 2011-02-21
Filing date: 2011-02-21
Publication date: 2012-08-30
Also published as: KR20130118982A; CN103380563A; EP2680400A1; JPWO2012114428A1

Abstract

Provided is a rotating electrical machine, wherein a die need not be newly built upon manufacturing a rotating electrical machine with a different diameter, and hence, manufacturing cost thereof is inexpensive. Unit cores (1) of the rotating electrical machine are provided with a plurality of teeth cores (11) connected in bendable state. A core-back section (17) of each of the teeth cores has a plurality of curvatures.

Description

Rotating electrical machine unit core

The present invention relates to a unit core of a rotating electrical machine.

Examples of conventional stator core structures for rotating electrical machines having split cores are those disclosed in Patent Document 1 (Patent No. 3017085) and Patent Document 2 (Patent No. 3379461). In the techniques disclosed therein, the unit core is taken out from the mold in a state where a plurality of tea scores are integrally connected. Next, in a state where a plurality of tee scores are linearly connected or warped in a reverse arc shape, winding is concentrated on each tooth, and then the unit core is deformed into a round shape to form a unit core. Are fixed by shrink fitting to the frame.

However, in the conventional unit core structure described above, when rotating electrical machines having different core diameters are manufactured, it is necessary to make a new mold, and there is a problem that the manufacturing cost is high.

Japanese Patent No. 3017085 Japanese Patent No. 3379461

The present invention has been made to solve the above problems, and provides a unit core of a rotating electrical machine that can manufacture rotating electrical machines having different core diameters without being forced to make a new mold. The purpose is to do.

In order to achieve the above-described object, the present invention is a unit core of a rotating electrical machine having a plurality of tee scores connected to bendable, and each core back portion of the tee score has a plurality of curvatures. ing.

According to the unit core of the present invention, when a rotating electrical machine having a different diameter is manufactured, it is not necessary to make a new mold, and it is possible to provide a rotating electrical machine having a low manufacturing cost.

It is a figure which shows the tea score of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure which shows the unit core with which the some tea score was connected. FIG. 3 is an assembly diagram of a stator including the tee score of FIG. 2. It is a figure which shows the metal mold | die layout of the unit core of FIG. It is a figure of the same aspect as FIG. 1 regarding the structure of a smaller diameter regarding Embodiment 1. FIG. It is a figure of the same aspect as FIG. 2 regarding the structure of a smaller diameter regarding Embodiment 1. FIG. It is a figure of the same aspect as FIG. 3 regarding the structure of a smaller diameter regarding Embodiment 1. FIG. FIG. 5 is a view of the same mode as that of FIG. It is a figure which shows the slit part vicinity regarding the structure of a smaller diameter regarding Embodiment 1. FIG. It is a figure which shows the arrangement | sequence pattern in which the match | combination part between tea scores is oriented to one direction regarding the unit core of Embodiment 2. FIG. It is a figure which shows the arrangement | sequence pattern in which the matching part between tea scores has faced the reverse direction to FIG. FIG. 10 is a diagram showing the vicinity of a connecting portion of adjacent tea scores in the second embodiment. It is a figure of the same aspect as FIG. 10 regarding the structure of a smaller diameter regarding Embodiment 2. FIG. It is a figure of the same aspect as FIG. 11 regarding the structure of a smaller diameter regarding Embodiment 2. FIG. FIG. 13 is a view similar to FIG. 12 regarding the configuration of a smaller diameter in the second embodiment.

Hereinafter, embodiments of a split core of a rotating electrical machine according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a tee score of the rotating electrical machine according to the first embodiment. FIG. 2 is a diagram illustrating a unit core in which a plurality of tea scores are connected. FIG. 3 is an assembly view of a stator including the tee score of FIG. The unit core 1 of the rotating electrical machine includes a plurality of teascores 11 connected to bend. The unit core 1 constitutes a stator of a rotating electrical machine by using one or more unit cores 1.

Each tea score 11 has a base portion 13 and a teeth portion 15. In the present embodiment, the plurality of tea scores 11 constituting the unit core 1 are all configured as one piece.

Each tooth portion 15 extends from the inside of the corresponding base portion 13 in the stator radial direction. Each tea score 11 has a core back portion 17 located on the opposite side of the base portion 13 from the tooth portion 15. Each core back portion 17 of the tee score 11 has a plurality of curvatures.

Each of the core back parts 17 includes one first arc part 1a as a first music part and a pair of second arc parts 1b as a second music part. The one first music part and the pair of second music parts have different curvatures. The curvature of the second arc portion 1b is larger than the curvature of the first arc portion 1a, that is, the curvature radius R1 of the first arc portion 1a> the curvature radius R2 of the second arc portion 1b.

Both the first arc portion 1a and the second arc portion 1b are bent so as to protrude in the opposite direction to the teeth portion 15, that is, outward in the stator radial direction. In addition, the pair of second arc portions 1b are arranged separately on both sides of one first arc portion 1a. If it says from a bigger viewpoint, each core back part 17 will be bent so that the whole containing the 1st circular arc part 1a and the 2nd circular arc part 1b may protrude in the opposite direction to the teeth part 15, and centering on the teeth part 15 As symmetrically configured.

The unit core 1 having such a configuration is punched out by a mold 19 as shown in FIG. 4 and laminated in a unitary state with a plurality of teascores 11 connected as shown in FIG. It is formed. Thereafter, the unit core 1 is kept in a straight state as shown in FIG. 2, and the winding 2 is wound around each tooth portion 15, or the adjacent teeth tips are made wider than the state shown in FIG. 2. In a state where the unit core 1 is bent in a reverse arc shape, the winding 2 is wound around each tooth portion 15, and then the unit core 1 is deformed in an arc shape as shown in FIG. Further, thereafter, the arc-shaped unit core 1 is fixed to the frame 3 by shrink fitting, or is welded to the frame 3 at the core back portion using a jig. In shrink fitting, at least one arc portion of the core back portion is brought into contact with the frame, and in welding, at least one arc portion of the core back portion is brought into contact with the jig.

In the present embodiment, as shown in FIG. 3, the six unit cores 1 are connected to form an annular shape, thereby forming one stator 100, and accordingly, the radius of curvature R <b> 1 of the first arc portion 1 a. The six virtual arcs are also combined to form one circle (circle having a diameter D1). Therefore, the curvature of the first arc portion 1a is also set to such a curvature.

The inner diameter D1 of the annular frame 3 is fixed in contact with the first arc portion 1a having the curvature radius R1. When the unit core 1 is deformed in an arc shape, the adjacent tooth portions 15 form a magnetic path by contacting the slit portions 1c. The slit base 1d is formed in a circular shape so as not to be damaged during deformation.

Further, regarding the first embodiment, the configuration of the unit core 1 ′ directed to a rotating electrical machine having a smaller stator diameter than the above-described modes of FIGS. 1 to 4 will be described. 5, FIG. 6, FIG. 7 and FIG. 8 are views of the same mode as FIG. 1, FIG. 2, FIG. 3 and FIG. Moreover, FIG. 9 is a figure which shows the slit part vicinity in such a smaller diameter unit core.

Even in the smaller-diameter unit core 1 ′, the core back portion 17 is provided with the first arc portion 1a having one curvature radius R1 and the two second arc portions 1b having the curvature radius R2. is there. The difference between the aforementioned unit core 1 and the smaller-diameter unit core 1 ′ is that the angular direction in which the slit portion 1 e of the unit core 1 ′ extends is different from the angular direction in which the slit portion 1 c of the unit core 1 extends. That is, as best shown in FIG. 9, the space between the adjacent slit portions 1e is wider than between the slit portions 1c. Similarly, the angular direction in which the abutting ends 1 e ′ of the tee scores 11 at both ends of the unit core 1 ′ extend is also different from the angular direction of the abutting ends 1 c ′ of the unit core 1.

Such a smaller-diameter unit core 1 'is assumed that the slit portion 1c is changed to the slit portion 1e by exchanging a die and a punch (not shown) corresponding to the portion A in FIG. Can be manufactured. Further, the abutting end 1e 'of the unit core 1' is also obtained by changing the abutting end 1c 'by exchanging the die and punch (not shown) of the mold.

Also in the case of such a smaller-diameter unit core 1 ′, the stator 100 as shown in FIG. 7 is finally obtained by the same procedure and method as the unit core 1. However, in the embodiment of FIG. 7, the four unit cores 1 ′ are connected to form an annular shape to constitute one stator 100, and the inner diameter D2 (D2 <D1) of the annular frame 3 has a curvature. It is fixed in contact with the second circular arc portion 1b having the radius R2. Therefore, four virtual arcs with the radius of curvature R2 of the second arc portion 1b are combined to form one circle (circle having a diameter D2). That is, the curvature of the second arc portion 1b is also set to such a curvature.

Thus, according to the unit core of the first embodiment, since a plurality of curvatures are provided in the core back portion of each tee score, the number of unit cores used to make a circle is changed, and the unit core By changing the arc portion of the core back portion applied to the inside of the object to be provided, it is possible to correspond to the configuration of cores having a plurality of diameters. Therefore, it is only necessary to make partial changes to a rotating electric machine with a different diameter without producing a new mold, so that the mold cost can be reduced, and thus the rotating electric machine can be manufactured at low cost. Can do.

Embodiment 2. FIG.
The unit core of the second embodiment is different from the first embodiment in that a plurality of tee scores are connected by a joint instead of a one-piece, and the other parts are the same as in the first embodiment. And FIG. 10 and FIG. 11 are both diagrams showing a core piece configured by stacking unit cores related to the second embodiment. More specifically, FIG. FIG. 11 shows an arrangement pattern in which a matching portion between tea scores is directed in the opposite direction. Moreover, FIG. 12 is a figure which shows the connection part vicinity of an adjacent tea score.

The core back portion 17 of each tee score 51 of the unit core 5 of the second embodiment also includes one first arc portion 1a having a radius of curvature R1 and two second arc portions 1b having a radius of curvature R2. ing. The unit core 5 can be obtained by laminating one punched into the pattern of FIG. 10 by a blade and one punched into the pattern of FIG. In the unit core 5 formed through the above lamination, the adjacent tea scores 51 are connected by the joint portion 53, that is, the adjacent tea scores 51 are connected to each other by the dowel portion 5d so as to be rotatable with respect to each other. Yes.

In such a unit core 5, as in the case of the unit core 1, the winding 2 is wound around each tooth portion 15 in a straight state, or the adjacent tooth tips are widened to extend the unit core 5. Are wound around each tooth portion 15 in a state of being bent in a reverse arc shape, and then the unit core 5 is deformed into an arc shape. Further, thereafter, the arc-shaped unit core 1 is fixed to the frame 3 by shrink fitting or welding.

Also in the second embodiment, one stator 100 is configured by connecting the six unit cores 5 so as to form an annular shape. Therefore, there are also six virtual arcs based on the curvature radius R1 of the first arc portion 1a. By combining them, one circle (circle having a diameter D1) is formed. The frame 3 is in contact with the first arc portion 1a having the curvature radius R1. Also in the unit core 5, when the unit core 5 is deformed in an arc shape, a magnetic path is formed between the adjacent tooth portions 15 by contacting the slit portions 5 c with each other.

Regarding the second embodiment, the configuration of the unit core 5 ′ directed to a rotating electrical machine having a smaller stator diameter than the above-described modes of FIGS. 10 to 12 will be described. FIGS. 13 to 15 are diagrams showing the same mode as FIGS. 10 to 12, respectively.

In the smaller-diameter unit core 5 ′, as shown in FIG. 15, the angular direction in which the slit portion 5e of the unit core 5 ′ extends is different from the angular direction in which the slit portion 5c of the unit core 5 extends, and adjacent slit portions 5e. Is wider than between the slit portions 5c described above. Similarly, the angular direction in which the abutting ends 5 e ′ of the tee scores 51 at both ends of the unit core 5 ′ are different from the angular direction of the abutting ends 5 c ′ in the unit core 5.

Such a smaller-diameter unit core 5 'is assumed that the slit portion 5c is changed to the slit portion 5e by exchanging the die and punch (not shown) corresponding to the portion B in FIG. Can be manufactured. Further, the abutting end 5e 'of the unit core 5' is also obtained by changing the abutting end 5c 'by exchanging the die and punch (not shown) of the mold.

Also in the case of such a smaller-diameter unit core 5 ′, the four unit cores 5 ′ are connected to form an annular shape, thereby forming one stator 100, which has a curvature radius R2 of the second arc portion 1b. The four virtual arcs are combined to form one circle (circle having a diameter D2). The annular frame 3 is in contact with the second arc portion 1b having the curvature radius R2.

As described above, the unit core of the second embodiment also has a plurality of curvatures in the core back portion of each tee score. Therefore, the number of unit cores used to make a circle is changed. By changing the arc portion of the core back portion applied to the inside of the object to be provided, it is possible to correspond to the configuration of cores having a plurality of diameters. Therefore, it is only necessary to make a partial change for a rotating electric machine having a different diameter without newly manufacturing a mold.

Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

In the above embodiment, each core back portion is composed of only one first music portion and two second music portions, but the present invention is not limited to this. Therefore, each core back portion only needs to include at least one first curved portion and at least one second curved portion, and may have three or more kinds of curvatures, thereby It is also possible to manufacture a rotary electric machine having three or more types of diameters at a low cost. Moreover, the number and position of the 1st music part and the 2nd music part can be changed suitably.

In the above embodiment, the mold layout in which six tea scores are integrally connected has been described. However, the present invention can also be implemented in a mold layout in which other numbers of tea scores are connected. For example, the present invention can also be applied to a mold in which 9 or 12 tea scores are connected.

Further, in the above embodiment, the stator is configured by connecting a plurality of unit cores bent into an arc shape, but the present invention is not limited to this, and one unit core including all necessary tea scores. A mode in which the stator is configured by bending the ring into an annular shape is also included.

1, 1 ', 5, 5' unit core, 1a 1st arc part, 1b 1st arc part, 1c, 5c slit part, 1c ', 5c' abutting end part, 1d slit root part, 1e, 5e slit Part, 1e ', 5e' contact end, 2 windings, 3, frame, 11, 51 tee score. 100 stator.

Claims

A unit core of a rotating electrical machine having a plurality of teascores connected to bendable,
Each core back portion of the tee score is a unit core of a rotating electrical machine having a plurality of curvatures.
Each of the tea scores has a base portion and a teeth portion,
The core back part is located on the opposite side of the base part from the teeth part,
Each of the core back parts includes at least one first music part and at least one second music part,
The first music part and the second music part have different curvatures,
2. The unit core for a rotating electrical machine according to claim 1, wherein both the first curved portion and the second curved portion protrude in a direction opposite to the tooth portion.
One of the first curved portions is formed, and a pair of the second curved portions are formed,
The curvature of the pair of second music parts is larger than the curvature of the first music parts,
The unit core of a rotating electrical machine according to claim 2, wherein the pair of second curved portions are arranged on both sides of the first curved portion.
The unit core of the rotating electrical machine according to any one of claims 1 to 3, wherein a plurality of the tee scores configured as one piece are included.
The unit core of the rotating electrical machine according to any one of claims 1 to 3, wherein a plurality of the tee scores connected at joint portions are included.